What question is being asked about the AC system?
Possibly needs recharged with refrigerant. You can check low pressure side with a guage.
you just move the flaps around
Behind the passanger side head light.
The low side port is located on the air conditioner compressor. The low side port will be the entry for recharging your air conditioning system.
yes!
Low coolant? Control cable not adjusted properly Bad thermostat?
try charging it. you can get the freon at your local autoparts store
air flow is bad or t.p.s is bad check spark, check fuel
it will fit properly if you sawp out the headlights and front bumper from a 87-89
try ebay, search 1985 300zx for the Nissan Service Manual, I have the 1986 manual , it contains the wiring diagram
it is a vacuum leak-replace the vacuum line from the right side along the right front-tiny vacuum line probably split
1989 supra turbo 5 speed is = to 1985 300zx turbo 5 speed?